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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee2d068a11531f77250d7f89b94bd629639f56f9997447ebaa4a72e20a2292b7' 
  AND token = 'OXxohcXxQO4AozKEeSV1lyiO7vg5U4wKeFW3ibJaiAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}