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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25cc24b8445c55f8f8d0058ee52a01f46a4a97b35aae23c820ca348cf2d837d8' 
  AND token = 'j2wSatZztRHvcQ/yEno1jdR0kOD2T1OTBPi0wRvmAok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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