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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e60b2e4870e6b1899e7a70886ff9333de7abdc028ddbb56bb656bce305211a19' 
  AND token = 'bSBrnPb4T3JbaPB0gCHpHOdpti2wJntDz9jkDjmLA2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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