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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e6c25e6a160d55edf599b18ec46e6e6dab4917c7a6c66ce04403161403d8a8d6' 
  AND token = 'ofVMHwrWBRLqjeKP77Sd7z3rrjPWtdQrcWkDWwNOwa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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