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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '29b151b58368485f3a749e14d26e6028595a2b6269381f3c6d1f1b52a224fad3' 
  AND token = 'TTNIV63dvgqVW5BIvx1vs9OHremmd0ImYGf2uWQmHr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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